dlib VS2013 face关键点检测与对齐
http://blog.csdn.net/hust_bochu_xuchao/article/details/53906223
http://blog.csdn.net/xiamentingtao/article/details/50908190
https://stackoverflow.com/questions/37210655/opencv-detect-face-landmarks-ear-chin-ear-line
快速上手使用Dlib进行人脸检测,无需CMAKE编译。
http://blog.csdn.net/shuzfan/article/details/52149882
人脸对齐方法
http://answers.opencv.org/question/24670/how-can-i-align-face-images/
https://stackoverflow.com/questions/10143555/how-to-align-face-images-c-opencv
dlib人脸对齐算法以so库部署到android中